COMSOL - Heatpipe
 

Hi everyone,

I am trying to understand the physical conditions of Heatpipes and want to simulate these with the Multiphysic Software COMSOL.
For this, I don't want to calculate the phase change with two phase flow.
So for the vapor region I take Laminar Flow (for the Steam) and for the wick structure the Darcy's Law with Porous Media (for Copper and Water).

The first tests are successful, while the lengths of evaporator and condenser section is equal. When changing this proportion I get results for the pressure, what cannot be real.....

Is here anyone, who could take a look on my simulation. Please contact me.
Best regards
Paco_2210